Looking at the Voice Chat | Documentation - Roblox Creator Hub and was wondering if you could possibly have different channels and what I mean by channels is one where everyone can hear you and another where specific users could hear you however it would be global instead of spacial.
channel 1 would be heard by all users near by
channel 2 would be heard by all users on the same team as you globally meaning no matter where you are you could hear x emitter.
Hopefully the short explanation helps with your understanding.